Cisco C880 M4 Operating Manual page 31

Hard Disk Drives

During insertion of the disk drive, hold it firmly with both hands in
order not to cause any vibration or shock.

Push the disk drive with the lever opened into the empty bay until it
stops.

Return the lock lever. A clicking sound from it indicates that it is locked.
Cisco C880 M4 Storage Subsystem Operating Manual for Server with E7-8800 v3 CPU
Removing/Installing Hard Disk Drive/Drive Dummy
31